keyfile was being initialized before being set by configure call.

this made it so that snapps always use ephemeral keys.
this fixes this.

llarp/service/context.cpp

@@ -189,12 +189,12 @@ namespace llarp
       if (not service)
         throw std::runtime_error(stringify("Failed to construct endpoint of type ", endpointType));
 
-      if (not service->LoadKeyFile())
-        throw std::runtime_error("Endpoint's keyfile could not be loaded");
-
       // pass conf to service
       service->Configure(conf.network, conf.dns);
 
+      if (not service->LoadKeyFile())
+        throw std::runtime_error("Endpoint's keyfile could not be loaded");
+
       // autostart if requested
       if (autostart)
       {